Synchronous chaos and broad band gamma rhythm in a minimal multi-layer model of primary visual cortex

Biology – Quantitative Biology – Neurons and Cognition

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

49 pages, 11 figures, 7 tables

Scientific paper

10.1371/journal.pcbi.1002176

Visually induced neuronal activity in V1 displays a marked gamma-band component which is modulated by stimulus properties. It has been argued that synchronized oscillations contribute to these gamma-band activity [... however,] even when oscillations are observed, they undergo temporal decorrelation over very few cycles. This is not easily accounted for in previous network modeling of gamma oscillations. We argue here that interactions between cortical layers can be responsible for this fast decorrelation. We study a model of a V1 hypercolumn, embedding a simplified description of the multi-layered structure of the cortex. When the stimulus contrast is low, the induced activity is only weakly synchronous and the network resonates transiently without developing collective oscillations. When the contrast is high, on the other hand, the induced activity undergoes synchronous oscillations with an irregular spatiotemporal structure expressing a synchronous chaotic state. As a consequence the population activity undergoes fast temporal decorrelation, with concomitant rapid damping of the oscillations in LFPs autocorrelograms and peak broadening in LFPs power spectra. [...] Finally, we argue that the mechanism underlying the emergence of synchronous chaos in our model is in fact very general. It stems from the fact that gamma oscillations induced by local delayed inhibition tend to develop chaos when coupled by sufficiently strong excitation.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Synchronous chaos and broad band gamma rhythm in a minimal multi-layer model of primary visual cortex does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Synchronous chaos and broad band gamma rhythm in a minimal multi-layer model of primary visual cortex, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronous chaos and broad band gamma rhythm in a minimal multi-layer model of primary visual cortex will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-171649

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.